Diagnosis Medusa with cylindrical manubrium , with 4 simple lips; 4 radial canals, 4 groups of perradial tentacles and 4 rudimentary bulbs; gonads on manubrium and on proximal part of radial canals, according sex; with ocelli, one per bulb.
Hydroid colony small, stolonal; hydranth naked, sessile, with a single ring of filiform tentacles near the middle of column; medusa buds just below tentacles. [details]